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[PWGLF] Nuclei hadron correlation: fix purity histograms and add rejection of protons #18173

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Merged
maciacco merged 2 commits into from
Oct 5, 2026
Merged

[PWGLF] Nuclei hadron correlation: fix purity histograms and add rejection of protons #18173

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5f462eb
Add purity histos
ercolessi Oct 5, 2026
b179e4d
fix bool and rej protons
ercolessi Oct 5, 2026
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33 changes: 28 additions & 5 deletions PWGLF/Tasks/Nuspex/hadronnucleicorrelation.cxx
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Original file line number Diff line number Diff line change
Expand Up @@ -95,6 +95,7 @@ struct HadronNucleiCorrelation {
Configurable<bool> isPrim{"isPrim", true, "is isPrim"};
Configurable<bool> doCorrection{"doCorrection", false, "do efficiency correction"};
Configurable<bool> doQuadraticPID{"doQuadraticPID", false, "do PID with sum in quadrature of TOF and TPC"};
Configurable<bool> doPIDRej{"doPIDRej", false, "do PID rejection of competing species"};

struct : ConfigurableGroup {
std::string prefix = "Coalescence"; // JSON group name
Expand Down Expand Up @@ -130,12 +131,13 @@ struct HadronNucleiCorrelation {
Configurable<float> nsigmaElPr{"nsigmaElPr", 1.0f, "cut nsigma TPC El for protons"};
Configurable<float> nsigmaElDe{"nsigmaElDe", 3.0f, "cut nsigma TPC El for protons"};
Configurable<float> nsigmaTOF{"nsigmaTOF", 3.5f, "cut nsigma TOF"};
Configurable<float> nsigmaTOFPrRej{"nsigmaTOFPrRej", 3.f, "cut nsigma TOF for proton rejection"};
Configurable<bool> doPrRej{"doPrRej", true, "do TOF proton rejection"};
Configurable<float> nsigmaQuadratic{"nsigmaQuadratic", 3.0f, "cut on sqrt(nsigmaTPC^2 + nsigmaTOF^2), used above the TOF pT threshold when doQuadraticPID is on"};
Configurable<float> nsigmaITSPr{"nsigmaITSPr", -2.0f, "cut nsigma ITS Pr"};
Configurable<float> nsigmaITSDe{"nsigmaITSDe", -2.0f, "cut nsigma ITS De"};
Configurable<bool> doITSPID{"doITSPID", true, "do ITS PID"};
Configurable<float> pTthrprTOF{"pTthrprTOF", 0.8f, "threshold pT proton to use TOF"};
Configurable<float> pTthrprTPCEl{"pTthrprTPCEl", 1.0f, "threshold pT proton to use TPC El rejection"};
Configurable<float> pTthrdeTOF{"pTthrdeTOF", 1.0f, "threshold pT deuteron to use TOF"};
Configurable<float> pTthrdeTPCEl{"pTthrdeTPCEl", 1.0f, "threshold pT deuteron to use TPC El rejection"};
Configurable<bool> rejectionEl{"rejectionEl", true, "use TPC El rejection"};
Expand Down Expand Up @@ -407,6 +409,8 @@ struct HadronNucleiCorrelation {
registryQa.add("QA/h3dTPCTOF_AntiPr", "n#sigma TPC vs n#sigma TOF", {HistType::kTH3D, {tpcNSigmaAxis, tofNSigmaAxis, ptAxis}});
registryQa.add("QA/h3dTPCTOF_De", "n#sigma TPC vs n#sigma TOF", {HistType::kTH3D, {tpcNSigmaAxis, tofNSigmaAxis, ptAxis}});
registryQa.add("QA/h3dTPCTOF_AntiDe", "n#sigma TPC vs n#sigma TOF", {HistType::kTH3D, {tpcNSigmaAxis, tofNSigmaAxis, ptAxis}});
registryQa.add("QA/h3dTPCTOF_De_Rej", "n#sigma TPC vs n#sigma TOF", {HistType::kTH3D, {tpcNSigmaAxis, tofNSigmaAxis, ptAxis}});
registryQa.add("QA/h3dTPCTOF_AntiDe_Rej", "n#sigma TPC vs n#sigma TOF", {HistType::kTH3D, {tpcNSigmaAxis, tofNSigmaAxis, ptAxis}});
registryQa.add("QA/hnSigmaTPCVsPt_El", "n#sigma TPC vs p_{T} for e hypothesis (all tracks)", {HistType::kTH2D, {ptAxis, tpcNSigmaAxis}});
registryQa.add("QA/hnSigmaTPCVsPt_Pr", "n#sigma TPC vs p_{T} for p hypothesis (all tracks)", {HistType::kTH2D, {ptAxis, tpcNSigmaAxis}});
registryQa.add("QA/hnSigmaTPCVsPt_De", "n#sigma TPC vs p_{T} for d hypothesis (all tracks)", {HistType::kTH2D, {ptAxis, tpcNSigmaAxis}});
Expand Down Expand Up @@ -581,7 +585,6 @@ struct HadronNucleiCorrelation {
{
const bool isTPCPID = std::abs(track.tpcNSigmaPr()) < nsigmaTPC.value;
const bool isTOFPID = std::abs(track.tofNSigmaPr()) < nsigmaTOF.value;
const bool isTPCElRejection = rejectionEl.value && track.beta() < BetahasTOFthr && track.pt() < pTthrprTPCEl.value && track.tpcNSigmaEl() >= nsigmaElPr.value;
const bool isITSPID = track.itsNSigmaPr() > nsigmaITSPr.value;

const bool isQuadraticPID = std::hypot(track.tpcNSigmaPr(), track.tofNSigmaPr()) < nsigmaQuadratic.value;
Expand All @@ -594,7 +597,7 @@ struct HadronNucleiCorrelation {
if (!doITSPID.value || isITSPID) {
return signCheck;
}
} else if (isTPCElRejection || isTOFPID) {
} else if (isTOFPID) {
return signCheck;
}
}
Expand All @@ -619,11 +622,15 @@ struct HadronNucleiCorrelation {
const bool isTOFPID = std::abs(track.tofNSigmaDe()) < nsigmaTOF.value;
const bool isTPCElRejection = rejectionEl.value && track.beta() < BetahasTOFthr && track.pt() < pTthrdeTPCEl.value && track.tpcNSigmaEl() >= nsigmaElDe.value;
const bool isITSPID = track.itsNSigmaDe() > nsigmaITSDe.value;
const bool isNotPr = std::abs(track.tofNSigmaPr()) >= nsigmaTOFPrRej.value || !doPrRej.value;

const bool isQuadraticPID = std::hypot(track.tpcNSigmaDe(), track.tofNSigmaDe()) < nsigmaQuadratic.value;

// Check if the sign of the track matches the expected sign for deuterons or antideuterons
const bool signCheck = (sign > 0 && track.sign() > 0) || (sign < 0 && track.sign() < 0);
if (!isNotPr) {
return false;
}
if (!doQuadraticPID.value) {
if (isTPCPID) {
if (track.pt() < pTthrdeTOF.value) {
Expand Down Expand Up @@ -1021,20 +1028,36 @@ struct HadronNucleiCorrelation {
registryQa.fill(HIST("QA/hnSigmaTOFVsPt_De"), track.pt() * track.sign(), track.tofNSigmaDe());
registryQa.fill(HIST("QA/hnSigmaITSVsPt_Pr"), track.pt() * track.sign(), track.itsNSigmaPr());
registryQa.fill(HIST("QA/hnSigmaITSVsPt_De"), track.pt() * track.sign(), track.itsNSigmaDe());

const bool isTPCElRejection = rejectionEl.value && track.beta() < BetahasTOFthr && track.pt() < pTthrdeTPCEl.value && track.tpcNSigmaEl() >= nsigmaElDe.value;
const bool isTOFPID = std::abs(track.tofNSigmaDe()) < nsigmaTOF.value;
const bool isNotPr = std::abs(track.tofNSigmaPr()) >= nsigmaTOFPrRej.value || !doPrRej.value;

if (track.sign() > 0) {

if (track.pt() >= pTthrprTOF.value || !doITSPID.value || track.itsNSigmaPr() > nsigmaITSPr.value) {
registryQa.fill(HIST("QA/h3dTPCTOF_Pr"), track.tpcNSigmaPr(), track.tofNSigmaPr(), track.pt());
}
if (track.pt() >= pTthrdeTOF.value || !doITSPID.value || track.itsNSigmaDe() > nsigmaITSDe.value) {
registryQa.fill(HIST("QA/h3dTPCTOF_De"), track.tpcNSigmaDe(), track.tofNSigmaDe(), track.pt());
if (isNotPr) {
registryQa.fill(HIST("QA/h3dTPCTOF_De"), track.tpcNSigmaDe(), track.tofNSigmaDe(), track.pt());
if (isTPCElRejection || isTOFPID) {
registryQa.fill(HIST("QA/h3dTPCTOF_De_Rej"), track.tpcNSigmaDe(), track.tofNSigmaDe(), track.pt());
}
}
}
}
if (track.sign() < 0) {
if (track.pt() >= pTthrprTOF.value || !doITSPID.value || track.itsNSigmaPr() > nsigmaITSPr.value) {
registryQa.fill(HIST("QA/h3dTPCTOF_AntiPr"), track.tpcNSigmaPr(), track.tofNSigmaPr(), track.pt());
}
if (track.pt() >= pTthrdeTOF.value || !doITSPID.value || track.itsNSigmaDe() > nsigmaITSDe.value) {
registryQa.fill(HIST("QA/h3dTPCTOF_AntiDe"), track.tpcNSigmaDe(), track.tofNSigmaDe(), track.pt());
if (isNotPr) {
registryQa.fill(HIST("QA/h3dTPCTOF_AntiDe"), track.tpcNSigmaDe(), track.tofNSigmaDe(), track.pt());
if (isTPCElRejection || isTOFPID) {
registryQa.fill(HIST("QA/h3dTPCTOF_AntiDe_Rej"), track.tpcNSigmaDe(), track.tofNSigmaDe(), track.pt());
}
}
}
}

Expand Down
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